An Advanced Repeater Controller

The 8200 is a powerful repeater building block and is perfect for alf private and club systems. The 8200 contains everything necessary to convert any receiver and transmitter into a powerful repeater. Only one connection to the receiver and two to the transmitter are required. Menu style programming is accomplished with the built in keyboard and display. The user can select a 3 digit repeater up down code, CW ID message, CW ID interval, hang time, activity timer time,, and you can even select...

International

Amateur Radio has at ways been international in the sense that political boundaries, obviouslyH have never been able to stop radio wa es in midair. Todayr however international broadcasting (governmental, commercial, and also private amateur) is purposeful to a degree not ever known before and the worldwide communications of tomorrow, meaning in immediate future months and then all future years, is going to boggfe our minds, Just as an example As Wayne W2NS0 1 said in an interview for an...

Homing in

Joe Moeil PE K0OV PO Box 2508 Futlerton CA 92633 How well does your two meter FM transmitter hunting setup work when the signal is really weak Getting an accurate bearing with a beam or quad is tricky when the signal just barely breaks the squeich. Such situations are common at the beginning of hunts, particularly after you leave ihe high elevation of the starting point. Today s VHF and UHF ngs are very sensitive, bui their S-meters are not The S-meter takeoff point must be at an early stage in...

The Radio Works

The CAROLINA WINDOM 2 is a half-size 40-10 meter version of the CAHOLINA WINDOM with performance equal to the latter. It covers seven HF bands, including all WARC bands. A transmatch is required on alJ bands. It is fed with 50Q coax. It has a 10-foot vertical radiator section which works with the 66-fool Jong horizontal radiator to produce complex radiation patterns Simultaneously, the horizontal radiator acts as a counter poise for the vertical radiator. Radiation takes place high in the air...

BNB

FOR SALE-TEMPO 2020 Excellent Condition, has 11 meters plus New DT04. 400 plus shipping Call Gary (207) 778-46221 BN8897 SATELLITE TV V1DEOCIPHER II CHIPS Send SA E for Info 3715 Mur doch Ave. 109. Parkersburg WV 26102. IBNB898 TRANSMITTING TUBES Unused El* MAC 4-250 and 2*1000 transmitting tubes. Make an offer George Fcsler, 29 Walcott Valley Dr Hopkinton MA 01748 BNB099 toroia Micor Radios 45 watt, 4 freq. 136-150 MHz 80.00. Motorola Micor Radios 45 watt, 8 freq. 136-150 MHz 120.00. Motorola...

Ug

UG-2 SO 993 3 UG-21 9913 UG-146 A U UG-83B U THIS LIST REPRESENTS ONLY A FRACTION OF OUR HUGE INVENTORY 213 North Frederick Ave. 11 Gaithersburg, MD 20877 prices do not include shjpping prices subject to change visa. mastercard, add 4 ups c.o-d. add 3.00 per order MISSION CONSULTING, INC. MISSION COMMUNICATIONS 11903 AEiel Clociine SufTe 500 HOUSTON. TEXAS 77032 WE HAVE EXPANDED AND WOW STOCK MANY NEW PRODUCTS. WE CARRY AEA, ALINC0, AMEC0. AMP SUPPLY, APHA DELTA, AMTEC0. ARRL, INSTRUMENTS,...

Spectrum Analyzer

Frequency Range less man i MHz to more than 100 MH2 Vertical Logarithmic Linearity + 3dB fatness -2 d8 r 5-100 MHZ Lf generation 1 MHj dov.n appro* 8 dB (FBantJwtftn l8QkHi -3dB with the Isolation of a low capacity probe. Frequency Range less man i MHz to more than 100 MH2 Vertical Logarithmic Linearity + 3dB fatness -2 d8 r 5-100 MHZ Lf generation 1 MHj dov.n appro* 8 dB (FBantJwtftn l8QkHi -3dB with the Isolation of a low capacity probe. The Spectrum ProbetH opens up a whole new world you've...

Circle On Reader Service Card

Have a quick'n easy circuit idea Share it and get a one year subscription or extension to 73 Clearly mark alt entries as submissions for Circuits to distinguish them from manuscripts. Send your Great Ideas From Our Readers entries lo Circuits' Magazine-Peterboroush' 03458 The August 1987 issue of 73 contains an article by WB5WSV describing a way to interface the IC-2AT with the M F J-1270 TNC-2 Terminai Node Controller. Normally, a microphone jack in a transceiver provides 3-wire op ration of...

Great Britain

Jeff Maynard G4EJA 32 Waldorf Heights Hawley Hilt Camberiey GU17-9JO England Regular readers of this column will know that the 50-metre band became available to UK amateurs only quite recently. So major openings still capture the attention of us all indeed, the events of the las .veekend of February have been described as the biggest 50-metre event since the band became available. Things began to look promising on the Wednesday when LU5EZT maritime mobile was worked 5 and 3 each way from G0DAZ...

Hi

C3 15REQUIRE D r E L IM iNATt P SSi& LE GSCHJLA'T .< H IN ThF CON r FH L CURP M S-OURCt Figure , Schematic of the FM demodulator. Free-running frequency of VCO f0 l.2 4(Rl)(CI) where r (3.6 x I03)(C2) Now for the real world Armed onlv w ith a poorly supplied junk box. IC spec sheet, frequency counter, ARRL Handbook and a Healhku H0-5405 station monitor scope, first assembled an oscillatpr circuit using a 555 timer IC, This circuit was running at about 350 Hz. Then set up the 565 to lock...

Rttyloop

Marc i Leavey, tf.D, WA3AJR 6 Jenny Lane Baltimore MD 21208 You ail are certainly a vocal crew. )t may take me until Labor Day to sift through all the responses to the First Annual Decade survey published here. But, try I must, and I promise to let you alt know the sense of the reader ship just as soon as 1 figure out what ilis In the meantime, here is the second in the series of one-evening kilchen table projects that you are all asking for. This month, I have a one-chip AFSK generator. With...

Heucal Resonator Preamps

Low noise preamps wrtft helicaJ resonators reduce intermod amp cross-band interference in enseal applications MODEL HRA- , 49 vhf. S84 uhf. Spocty tuning range desired U2150, 15016 , W2-174. 213 233, 4 70-454. or 454-475. COR-3 REPEATER CONTROLLER krt. Features adjustable tai amp time-out timers, solid-state reiay, courtesy beepr and local speaker amplifier 49 COR-3 REPEATER CONTROLLER krt. Features adjustable tai amp time-out timers, solid-state reiay, courtesy beepr and local speaker...

Heil Sound

Volts Battery Charger Circuit Diagram

The HM-10 microphone is at the center of Heii Sound s Concept 2000. Unlike other amateur radio microphones, the HM-10 uses professional cannon-type 3-pin connectors. You can buy the HM-10 by itself, or with the Heil HC-4 DX Dream Machine ' or the Heil HC-5 full range element. Interface the HM-10 to your transmitter Input connector by specifying the cable with the right color red. Kenwood yellow, Yae su- blue, ICOM and black, special. Operate pit or vox, handheld or desk mounted. Adjustable...

Info

Dandy Dipole Kit With Insulator Includes 1 Danciy Dipole ' Book of Instructions i PatrEndsulators 135 ft 4.7 Strand Copper Wire T V 3AU Center Insulalor Dandy Dipole ' KU Wilh W2AU 1 1 Baiun T Dancy Dipole Book of Instructions r Pair Fndsulators 1 35 ft 4 7 Strand Copper Wire i -W2AU 1 1 Balun M C VISA M O NO C O D Please A Your Local DMar Soon. In Hurry Orrler Di rat I lor Im madia te Delivery Unadlha Antenna Manufacturing Co. P.O. Box 4215 BV Andover, MA01B1 SOB 475 7831 Tired of looking for...

Homebrew

N6UE 24 COCOA A COtlinear COaxial Array Deluxe 80m wire antenna - -. . - W20ZH This project lets your rig and home computer talk to each other N7IPY Hasy-to-buiid, good gain antenna AF8B Add this mode to your rig ai little cost, Get started on putting together your 3cm system WB6IGP Quick V easy QRM-buster for your older

Ameritron ALA Linear

A reliable IkWamp at a bargain price. Ameritronh Inc. 2375 Dorr Street Toledo OH 43607 Phone 601 323 0715 Technicai Inquiries 419 531-3024 Ever tried to work a rare DX station, and have him tell you that he just couldnl pult you oui of the mud Then the big guns opened up. and you were gone. Ever tried to get a piece of priority traffic through when the receiving station couldn't pull you out of the slop, and there was no one around to relay Ever try to call the net up when only half the members...

Wau

Removable Weatherproofing for Connectors Every time I work on my outdoor antenna system, I find that I need to weatherproof a few coaxial connectors. After all, coax is expensive and I don't want moisture to get inside of it and spoil it. Over the years I have used silicon glues, butyl caulk, plastic electrical tape, and recently a shoe repair glue. All provided protection, at least initially. Although the shoe glue and the butyl caulks lasted very well they were murder to remove from the...

Sr

Frontend With Sa602

A lot of listening fun at an affordable price. Photo A. Top view of the the assembled Ramsey SR-1 receiver Photo courtesy of Bob W8MDVJ Ramsey Electronics offers inexpensive kits ranging from frequency counters to LED blinkers and small receivers. This simple, inexpensive AM-only shortwave receiver is a great starrer project for budding hams The parts come in a plastic bag with a single-sided phenolic PC board that has a solder mask but no component markings. The absence of a component layout...

Write Or Call For

How one Swiss group supports the education of young hams. At firsl, I did shortwave listening, hut in 1938 I goi my amateur license. Then, during WW I was in the Swiss Army Signal Corps, repairing equipment After thai I taught physics at the Basel technical college But we always come hack Recently, I began teaching amateur radio, 30 adults at a time, using my excellent physics equipment and the college physics auditorium. Candidates for ticcnses were tested by our experts from the PTT like the...

Ham help

V.fe B-o happy to provide Ham Help tilings free, on a space available basis. Please type or neatly pnnt your request on a full-sue sheet oi paper Use upper and lower case tetters nc ail caprtafs Be sure to print numbers carefully, A 1 and TV 7and V or I and other numbers and fetters can be easily m re ad when i hey are not pt ifed cteariy U' and V can also be confused Thank you for your cooperation, I need an operating manual and or schematic for a Heathkit H R-10 I will pay all associated...

Ramsey COM

The most features for the money in communications service monitors. Ramsey Electronics, Inc. 2575 Baird Road Penfieki, NY 14526 Tel 716 586-39SO Price Class 2500 i i I just bought a 2500 service mom 1 tor Drop that statement into po lite ham conversation, and you're guaran leed one of two resposes B. What's a service monitor First, the answer to liB. Acommunica tions service monitor is a tool used by anyone in the two-way radio busmess, or anywhere that precise measurement of radio parameters...

Personal

Ijgflplr--fl a C3K.il i pHjBB.boals.nvKt Wtt o.r.'E i r - i ruj .iny i lhJlTia yprr.tr 6 Gh a, ' ' -i ii-E f .gi Lf 0 amp Qi I. il i .1 tCIv I Jl P rn - i1 i r mitfl p i' lour.HHoer. amp rtri 'i. ur nr ebi pH' secontt1 pnone ouipui per nu-, i lo iciuji iiu pit n.rr J'ins Ivo 1 ih ci' M tins lo' Hiitnnri nai included i liui i .i p t i 'fi ' 1 OC fliy Ir' e ci ' cui n y i l'C ' H ipiniL K t .nelull-. iJoiu i ABSplftiLtt434 wiir s hi'etj y gra phi r r. Ifr r .i. i r . m nn j l gt nn A vi -i utK...

Power Rf Switched Preamps

Model 146 160W 2 Meters l9dbGain 75db Nf Model 1460S 160W 2 Meters 19dbGain ,75db Nf Model 440 70cm 100W 16dbGain .75db Nf All preamps have helical filters to prevent out of band intermodulalion in the receiver. Modef 146 covers trie entire 2 meter band Model 1460S is of very nairow bandwidth and would be salable for SSB Packet, or Satellite, Model 440 is factory tunable from 430-440 MHz or 440-450 MHz per customer request An moo amp ls are powered with 13 to 20 VDC and are mounted at the...

Hamsats Away From Home

Satellite mobile operations do well with low-orbit amateur radio satellites like RS-10 11 and Fuji-OSCAFM 2. The October and November 1987 columns discussed mobile activity in detail. But whai aboui portable setups With gain antennas, the highorbit birds, like AMSAT-OSCARID and 13t can yield many enjoyable contacts while you're on vacation or at a weekend campout at the beach Today many radios operate from 12 volts DC, and gain antennas don't need rotators pointing adjustments are made only...

Barry International Telex Merchandise Taken On Consignment For Top Prices

145mhz Gama Macth

Monday-Friday 9 A M ro6 30PM Thursday to 8 P M Saturday S Sunday to AM lo 5 PM iFree Parking IRT LEX-1 Spring St. Stalion1. Subways BMT- Prince St. Station IND-FJ1 Train-Bwy Station 8u amp Broadway 6 to Spring St. Paih-9lh S 76th Ave. Si anon, COMMERCIAL RADIOS STOCKED ICOM. Motoftv la MAXON. Standard, Yaesu Wo serve municipalities O sinesses CrviJ Defense ale Portables, mobiles, bases, repeaters We Stock AEA, ARRL, Alinco. Ameco, Ameritron, Anlonna Specialists, Astatic, Astronh B amp K, B amp...

S

Radio Shack parts are nearest whole values. Resistor values are nominally within 10 . For all practical purposes, the available Radio Shack values are close enough for this project to the specified values. If you can get exact values, fine. If not, don't lose any sleep over it. Radio Shack parts are nearest whole values. Resistor values are nominally within 10 . For all practical purposes, the available Radio Shack values are close enough for this project to the specified values. If you can get...

Doppler

Doppler Systems has expanded its RDF systems to cover frequencies up to 1 GHz. The 5000 series, using a remote RF summing circuit, is accurate 5 degrees. Doppler offers a wide range of antennas to cover frequencies between 108 and 1000 MHz, With a narrowband FM receiver, the system works in a quasi-Doppler mode. Using a patented technique, four antennas arranged in a square pattern simulate a single, rotating antenna. As it moves toward I he RF source, the apparent frequency increases, and as...

Azimuth Communications Corporation The Azimuth Awards Qsl Library

Azimuth announces its Awards QSL Library albums for organizing and protecting your QSL cards. You can select an album for each kind of award DX Century Clubh Worked Ail Zones, Worked Ail States, and Worked All Continents, with beautiful graphics for each award. Or you can order an album for all your QSLs in general Each album is made of durabfe, quality vinyl, its 20 scratch-resistant pages holding t2G cards. Each pocket page holds six 4 x 6 cards. The introductory price is 20 extra 20-page...

Philippines

Manalo DU1AUJ AsiaNet Packet Network Box 68, U P Diliman Quezon City 3004 Republic of the Philippines We were happy to receive this report from DU1AUJ in fact, we are always happy to receive re-ports from citizens of all countries outside the USA. particularly when there has been a long si-fence from a Hambassador. Lynn is thought to be the first Asian woman to go on HF packet and is the only XYL station on AM TOR andRTTY. She is active on 20 and 15 meters, and is active daily beginning...

Meters

Nothing matches the KRP-5000 for total performance and value. Ho GE. not v n Motorola. RF performance really counts Enjoy high performance opera in tough repeater environ- lionwilh remotepiogrammabii- ments 50 the KRP-S006 it-y. slqtifenOat tone paging, received gwes you helical autOpaich reverse autopatch. resbnalors, 12-poles of IF 200-numbe' autodial remote Filtering an-1 n precise squelch setting, status inputs. Schrnitt rigger squelch with control outputs. and field- automaiic ihreshold...

Never Sa Y

To be honest about it what .ve nave is a government policy of screwing small business Think abcul it. Both the administration and Congress are like willows bending whatever way lobbyists blow And iobbytsts are paid by big business, not by small Thus small business lias little control over the government tittle say little power The government moves the way money pushes rt. and bag business has the millions to be heard clearly wiping oui the faint background noise from small business which has...

Mfjb

MFJ-1270B super clone ofTAPR's TNC-2 gives you more features than any other packet controller - for S 139.95. You can double your fun by operating VHF and HF packet because you get high performance switchable VHF HF modems. You get the Easy Mall Personal Mailbox with soft partitioned memory so you and your ham buddies can leave messages for each other 24 hours a day. In MFJ fl new WeFAX mode you can print full fledged weather maps to screen or printer and save to disk using ail IBM compatible...